| Paper: | IMDSP-P5.4 | ||
| Session: | Image Coding | ||
| Time: | Wednesday, May 17, 10:00 - 12:00 | ||
| Presentation: | Poster | ||
| Topic: | Image and Multidimensional Signal Processing: Still Image Coding | ||
| Title: | Low Bit-rate Image Coding based on Pyramidal Directional Filter Banks | ||
| Authors: | Yilong Liu, Truong T. Nguyen, Soontorn Oraintara, University of Texas, Arlington, United States | ||
| Abstract: | This paper presents a novel embedded image coding system based on the pyramidal multidirectional image representation. The multiscale filter bank is a combination of the overcomplete pyramidal directional filter bank at higher scales and the traditional maximally-decimated wavelet filter bank at lower scales, to provide a sparse image representation. The coding algorithm then efficiently clusters the significant coefficients using progressive morphological operations. Context models for arithmetic coding are designed to exploit the intra-band dependency and the correlation existing among the neighboring directional subbands. Experimental results show that the proposed coding algorithm outperforms the current state-of-the-art wavelet based coders, such as JPEG2000, for images with directional features. | ||
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